diff --git a/testssl.sh b/testssl.sh
index c8ffdcf..018681f 100755
--- a/testssl.sh
+++ b/testssl.sh
@@ -79,7 +79,7 @@
      SWURL="https://testssl.sh/    "
 
 readonly PROG_NAME=$(basename "$0")
-readonly RUN_DIR=$(dirname "$0")
+readonly RUN_DIR=$(dirname "$(readlink -e $0)")
 INSTALL_DIR=""
 MAPPING_FILE_RFC=""